JP2003142009A - Plasma display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plasma display device capable of preventing deterioration in brightness of a phosphor and maintaining high display performance for a long time, and to provide the manufacturing method of the plasma display device. SOLUTION: This plasma display device has a front side panel substrate 1; a back side panel substrate 2 faced to the front side panel substrate 1 so as to form a discharge space between the front side panel substrate 1 and itself, having barrier ribs 11 plurally partitioning the discharge space and in which a plurality of electrodes are arranged so that discharge is generated in the discharge space partitioned with the barrier ribs 11, and a sealing member 22 for sealing the periphery of the front side panel substrate 1 and the back side panel substrate 2, and a position regulating part 21 for regulating the position of the sealing member 22 is arranged in the periphery of the back side panel substrate 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display device used for a large size device.

[0002]

2. Description of the Related Art Plasma display panels (hereinafter referred to as PD
A plasma display device using P) is attracting attention as a next-generation display device because it is relatively easy to make a large screen even with a small depth. At present, even products in the 60-inch class have been commercialized.

FIG. 2 is a diagram showing a main structure of a general AC surface discharge PDP. As shown in FIG. 2, the PDP has a front panel substrate 1 and a rear panel substrate whose main surfaces are opposed to each other. It consists of two.

The front panel substrate 1 has a transparent electrode 4 formed of ITO (indium tin oxide) or the like and a bus electrode 5 in which glass is mixed with silver on one main surface of a front glass 3 serving as a substrate. A plurality of display electrodes for performing surface discharge between the electrodes are formed, and a dielectric 6 made of an insulating material is coated so as to cover the display electrodes.
The protective film 7 having substantially the same size as that of the dielectric 6 is formed on the dielectric 6.

The rear panel substrate 2 has a plurality of address electrodes 9 formed in stripes at regular intervals on one main surface of a rear glass 8 serving as a substrate. Like the bus electrode 5, the address electrode 9 is also a mixture of silver and glass. Then, a dielectric 10 made of an insulating material is coated so as to include these address electrodes 9, and the dielectric 10
A partition wall 11 is formed on the top of the partition wall 11 so as to match the space between two adjacent address electrodes 9. Red (R), green (G), and blue (B) phosphor layers 12 are formed on the side walls of two adjacent partition walls 11 and on the surface of the dielectric 10 between them.

A discharge space is formed between the front panel substrate 1 and the rear panel substrate 2 having such a structure,
In addition, the display electrodes composed of the transparent electrodes 4 and the bus electrodes 5 and the address electrodes 9 are arranged so as to be orthogonal to each other so as to generate a discharge in the discharge space partitioned by the partition walls 11, and are arranged in the peripheral portions of both panel substrates. A sealing member 13 made of frit glass is applied, and the sealing member 13 is melted and fixed to seal the front panel substrate 1 and the rear panel substrate 2.

After the space 14 inside the PDP thus sealed is exhausted from the chip tube 15, the discharge gas (filled gas) containing xenon is supplied to a predetermined pressure (usually 40 kPa-
It is sealed at about 66.5 kPa) and the chip tube 15 is chipped off.

As a result, between the front panel substrate 1 and the rear panel substrate 2, the space 6, which is partitioned by the dielectric 6, the phosphor layer 12, and the two adjacent partition walls 11, becomes a discharge space. Further, a region where a pair of adjacent display electrodes and one address electrode 9 intersect with each other with the space portion 14 interposed therebetween is
It becomes a cell related to screen display.

When driving the PDP, in each cell, discharge is started between any of the display electrodes consisting of the address electrode 9 and the transparent electrode 4 and the bus electrode 5, and the glow discharge between the pair of display electrodes causes a short wavelength emission. Ultraviolet rays (resonance line of xenon, wavelength about 147 nm) are generated, and the phosphor layer 12
Lights up and the screen is displayed.

[0010]

Conventionally, as a PDP sealing method, a low melting point glass frit, a binder resin, a solvent and the like are mixed to form a sealing member paste, which is applied onto a substrate by dispenser coating or the like and dried. After that, this is melted and sealed.

However, in this method, the outgas generated when the binder resin contained in the low-melting glass frit is removed is adsorbed by the phosphor, which causes deterioration of the brightness of the PDP.

In order to prevent this, a method of using a rod-shaped sealing member obtained by melting frit glass containing no binder resin and processing it into a shape such as a square bar or a round bar has been considered. In this case, in order to fix the rod-shaped sealing member, it is necessary to provide an adhesive layer on the entire circumference of the rear panel substrate, which causes outgas. In addition, a construction method in which an adhesive layer is partially provided for the purpose of preventing the generation of outgas is conceivable. However, in this construction method, when the rod-shaped sealing member in the portion without the adhesion layer is attached to the front panel substrate, etc. There are problems such as breakage and loss of the sealing member, and fragments of the sealing member mixed into the panel.

The present invention has been made in view of the above problems, and plasma capable of maintaining good display performance for a long time by eliminating the generation of outgas generated from the sealing member and preventing the deterioration of the brightness of the phosphor. A display device is provided.

[0014]

In order to achieve the above-mentioned object, the present invention provides a rear panel substrate with a position regulating portion for regulating the position of a sealing member.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION That is, according to the invention described in claim 1 of the present invention, a front panel substrate having a plurality of electrodes and a front panel substrate are arranged so as to face each other so that a discharge space is formed therebetween. And a back side panel substrate provided with partition walls for partitioning the discharge space into a plurality and arranged with a plurality of electrodes so that discharge is generated in the discharge space partitioned by the partition walls, the front side panel substrate and the back side panel substrate. A sealing member for sealing the peripheral portion of the above, and a position restricting portion for restricting the position of the sealing member is disposed in the peripheral portion of the rear panel substrate.

The position restricting portion is made of the same material as the partition wall, and the position restricting portion is formed at the same time as the partition wall.

A plasma display device according to an embodiment of the present invention will be described below with reference to FIG. In FIG. 1, the same parts as those shown in FIG. 2 are designated by the same reference numerals.

FIG. 1 is an enlarged cross-sectional view showing a peripheral portion of a panel substrate of a PDP in a plasma display device according to an embodiment of the present invention.
It is sectional drawing cut | disconnected along. Hereinafter, an example of the configuration of the plasma display device according to the present invention will be described along with the manufacturing process.

In FIG. 1, the front panel substrate 1 is formed by forming ITO (indium tin oxide) as a transparent conductive film on the entire surface of the front glass 3 by a sputtering method, and forming a predetermined pattern shape by a photolithography method. The transparent electrode 4 is formed by processing. afterwards,
As a bus electrode 5 for the purpose of lowering the resistance value of the display electrode, a paste obtained by adding a photosensitive resin, a binder resin, a solvent, etc. to a low melting point glass frit using silver as a conductive material is printed on the front glass 3 by a screen printing method. Form by drying. The required resistance value is adjusted by the amount of silver as a conductive material and the film thickness. Here, the amount of silver is set to obtain a film thickness of 7 μm and a sheet resistance value of 2 mΩ / □. Further, in order to eliminate the influence of dust and the like and prevent derailment and short circuit, printing and drying were repeated twice using a 400 mesh screen plate. Similar to the transparent electrode 4, a pattern is formed by a photolithography method, and this is baked to form a bus electrode 5, which is combined with the transparent electrode 4 to form a display electrode.

Next, a dielectric material pasted so as to cover the display electrodes is applied onto the front glass 3 using a die coat, and this is baked to form a dielectric 6 having a thick film of 30 μm. After that, a protective film 7 made of magnesium oxide is formed by a vacuum evaporation method to complete the front panel substrate 1.

On the other hand, in the rear panel substrate 2, a plurality of address electrodes 9 are formed in a stripe shape at regular intervals on one main surface of a rear glass 8 serving as a substrate. This address electrode 9
Also formed in the same manner as the bus electrode 5. Then, a dielectric 10 made of an insulating material is formed so as to include these address electrodes 9. As a forming method, a pasted dielectric material is printed by a screen printing method, which is dried and then baked. The film thickness after firing was 20 μm.

A partition 11 is formed on the dielectric 10 so as to match the interval between two adjacent address electrodes 9.
The partition wall 11 was formed by applying a paste partition wall material by a die coating method, drying it, removing the phosphor forming portion by a sandblasting method, and then firing it to a height of 0.12 mm.

At this time, the partition wall material is applied up to the sealing member forming portion in the peripheral portion of the rear panel substrate 2, and unnecessary portions are similarly removed by the sandblasting method, and then baked to position the sealing member around the partition wall 11. The restriction portion 21 is formed. This position control unit 2
1 is made of the same material as the partition wall 11, and is formed simultaneously with the partition wall by the same method. The shape of the position regulating portion 21 is the partition wall 11
Same as above, but with one set with a pitch of 0.6 mm, and this is 2.
Three sets are formed at 0 mm intervals.

Then, red (R), green (G), and blue (B) phosphor layers (not shown) are provided on the side walls of the two adjacent partition walls 11 and on the surface of the dielectric 10 between them. The back side panel substrate 2 is formed by screen printing and is baked.
To complete.

Next, the front panel substrate 1 and the rear panel substrate 2 thus completed are assembled. First, three sets of position regulating portions with a pitch of 0.6 mm are formed in the peripheral portion of the rear panel substrate 2. A rod-shaped sealing member made of low-melting glass processed into a rod shape having a rectangular cross section of 0.5 mm is arranged between 21. At this time, since the rod-shaped sealing member is arranged and fixed between the position restricting portions 21, the conventional adhesive layer is unnecessary.

Next, the front panel substrate 1 and the rear panel substrate 2 are aligned with each other, fixed with an ultra-high temperature spring material, and then the rod-shaped sealing member is fired at a temperature of 400 ° C to 500 ° C. And sealed to form a PDP. By firing, the rod-shaped sealing member is melted to form the sealing member 22 having a width of about 5 mm. Since the height of the position restricting portion 21 is the same as that of the partition wall 11, the gap between the front panel substrate 1 and the rear panel substrate 2 can be the same in the sealing member 22 as in the panel.

Finally, after evacuating the space from the tip tube to a vacuum, 40 kPa (300 Torr) to 66.5 kPa (5
A rare gas (mixed gas of helium, xenon, neon, etc.) of 00 Torr) is enclosed to complete the PDP.

Although a rod-shaped sealing member processed into a rod shape having a rectangular cross section of 0.5 mm is used here, the size and shape are not limited as long as the sealing effect of the PDP is obtained. Further, the pitch of the position restricting portions, the number of forming members, etc. may be changed according to the size and shape of the rod-shaped sealing member. Also,
Although the sandblast method is used also as the method of forming the partition wall and the position regulating portion, it may be formed by using a method other than this method.

[0029]

As described above, according to the present invention, it is possible to eliminate the influence of outgas from the sealing member for sealing the front panel substrate and the rear panel substrate, and to improve the brightness of the phosphor with less deterioration. Thus, a long-life plasma display device can be obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a main configuration of a panel of a plasma display device according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a schematic configuration of a plasma display device.

[Explanation of symbols]

1 Front panel board 2 Rear panel board 4 transparent electrodes 5 bus electrodes 9 address electrodes 11 partitions 12 Phosphor layer 14 Space Department 21 Position Control Unit 22 Sealing member

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Tetsuya Shiratori             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. (72) Inventor Yoshiki Sasaki             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. (72) Inventor Takeshi Furukawa             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. F term (reference) 5C040 GF16 HA01 HA02 MA10 MA22                       MA23

Claims (4)

[Claims] 1. A front-side panel substrate having a plurality of electrodes, and a partition wall disposed to face the front-side panel substrate so as to form a discharge space therebetween and for partitioning the discharge space into a plurality of partitions. It has a back side panel substrate in which a plurality of electrodes are arranged so that discharge is generated in a partitioned discharge space, and a sealing member for sealing the peripheral part of the front side panel substrate and the back side panel substrate. In addition, the plasma display device is characterized in that a position restricting portion for restricting the position of the sealing member is disposed in the peripheral portion of the rear panel substrate. 2. The plasma display device according to claim 1, wherein the position restricting portion is made of the same material as the partition wall. 3. The plasma display device according to claim 1, wherein the position restricting portion is formed simultaneously with the partition wall. 4. The plasma display device according to claim 1, wherein a rod-shaped member is used as the sealing member.